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Mountain Weather MITOC Winter School 2001

Mountain Weather MITOC Winter School 2001. Dave Andersen. Why Weather?. Mt. Washington, 1/10/2001, 12:48pm: 0 degrees F; 54MPH wind, wind chill: -54. Weather Changes. January 1: Temperature 3 degrees; Snow, freezing fog, wind chill –50 Visibility: 100 feet. Weather Safety.

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Mountain Weather MITOC Winter School 2001

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  1. Mountain WeatherMITOC Winter School 2001 Dave Andersen

  2. Why Weather? Mt. Washington, 1/10/2001, 12:48pm: 0 degrees F; 54MPH wind, wind chill: -54

  3. Weather Changes • January 1: Temperature 3 degrees; • Snow, freezing fog, wind chill –50 • Visibility: 100 feet

  4. Weather Safety • Check the forecast • Forecasts are not always right • New England weather changes rapidly! • Stay alert to weather changes • Clouds and winds provide big hints

  5. Mountains get bad weather

  6. Cirrus Clouds High altitude clouds; good weather, possible rain in 12-24 hours for some types

  7. Cumulus Clouds • Nice weather, but keep an eye out

  8. Nimbostratus Clouds • Lower (2000m) clouds • Rain or snow coming soon

  9. Cumulonimbus Clouds with vertical growth (“Anvils”) (May not see the anvil when close) Heavy rain, snow, hail, lightning!

  10. Blue Skies • Good weather has its downsides too: The Sun (it’s a mass of incandescent gas…) • Sunburn can be serious • Light and U/V reflected by snow and ice • Sunburned retinas and mouths are not fun • Sunscreen, long-sleeved clothing, and sunglasses will make you happier

  11. Weather Summary • Check forecasts, check the skies often • Neither is a perfect predictor, so be prepared. • We’ve given a basic intro; there are two good weather websites linked from our web page. • Take-home lesson: STAY ALERT. Weather changes rapidly.

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